Synthesis and structure investigation of the antibiotic amoxicillin complexes of d-block elements
作者:M.A. Zayed、S.M. Abdallah
DOI:10.1016/j.saa.2004.08.022
日期:2005.7
formulae of these complexes were found to be ML(H2O)w(H2O)x(OH)y(Cl)2, where M = Fe(II), Co(III), w = 0, x = 2, y = 1, z = 0; M = Co(II), w = 0, x = 1, y = 0, z = 1; M = Fe(III), w = 0, x = 1, y = 2, z = 0; M = Ni(II), Cu(II) and Zn(II), w = 2, x = 0, y = 1, z = 0, where w = water of crystallization, x = coordinated water, y = coordinated OH(-) and z = Cl- in the outer sphere of the complex. The IR spectra
在溶液中形成的一些过渡金属(M)和阿莫西林三水合物(ACT)配体配合物(M-ACT)的研究涉及分光光度法测定化学计量比及其稳定性常数,发现这些比率为M:ACT = 1:在某些情况下为1:1:2和2:1。在选择的最佳条件下,使用摩尔比方法计算出的这些螯合物的稳定常数的值范围为K(f)= 10(7)至10(14)。这些数据通过计算它们的自由形成能deltaG证实,这与它们的高稳定性相对应。使用元素分析,红外,反射光谱,磁测量,质谱和热分析(TGA和DTA)研究了分离的固体配合物。这些配合物的拟议通式为ML(H2O)w(H2O)x(OH)y(Cl)2,其中M = Fe(II),Co(III),w = 0,x = 2,y = 1,z = 0; M = Co(II),w = 0,x = 1,y = 0,z = 1; M = Fe(III),w = 0,x = 1,y = 2,z = 0; M = N